Hate to burst bubbles, but drilled rotors do not enhance/improve braking at all. A rotor is in reality a heatsink, and holes take away from the mass that could take kinetic energy to heat.

Holes are used to help gases escape, and a gassing interface. For normal use having thermal mass is key.

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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)